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Department of Environmental Protection - Bureau of Air Quality
Air Quality - Online Data Service
Home : Atmospheric Deposition (Acid Rain) : Monitoring Location Selection

Below is the data summary for the following location:

Location: ME02 - Bridgton - Upper Ridge Road [select a new location]

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Supplemental Information: term definitions | general description of pH readings

Sample Start Date: Sample Stop Date: Total Precipitation - Rain Gauge: (inches) Total Precipitation - Sample Weight: (grams) Field Conductance Reading: (us/cm) Field pH Reading: Field pH Check Sample Reading: Precipitation Acidity Level:
Nov 17, 2009 03:00PM Nov 24, 2009 08:15AM 1.32 1976.30 3.1 4.83 5.0 Mildly Acidified
Nov 10, 2009 11:30AM Nov 17, 2009 03:00PM 2.32 4130.00 3.29 4.8 4.9 Mildly Acidified
Nov 3, 2009 11:00AM Nov 10, 2009 11:30AM 0.09 109.30 25.5 4.31 5.0 Strongly Acidified
Oct 27, 2009 10:30AM Nov 3, 2009 11:00AM 0.15 187.60 6.9 4.75 5.0 Mildly Acidified
Oct 20, 2009 02:00PM Oct 27, 2009 10:30AM 1.85 3116.80 6.6 4.8 4.9 Mildly Acidified
Oct 13, 2009 01:00PM Oct 20, 2009 02:00PM 0.37 111.10 5.2 5.8 4.9 Normal
Oct 6, 2009 11:45AM Oct 13, 2009 01:00PM 1.30 2173.90 7.28 4.65 5.0 Moderately Acidified
Sep 29, 2009 08:25AM Oct 6, 2009 11:45AM 1.82 3218.60 7.63 4.52 4.8 Moderately Acidified
Aug 25, 2009 09:00AM Sep 1, 2009 01:00PM 1.07 1813.80 2.87 4.8 4.8 Mildly Acidified
Aug 18, 2009 10:25AM Aug 25, 2009 09:00AM 1.82 3193.50 7.2 4.41 4.8 Moderately Acidified
Aug 11, 2009 10:40AM Aug 18, 2009 10:25AM 0.13 264.60 8.1 4.4 4.8 Moderately Acidified
Aug 4, 2009 09:00AM Aug 11, 2009 10:40AM 0.10 201.10 8.0 5.3 4.85 Normal
Jul 28, 2009 09:00AM Aug 4, 2009 09:00AM 2.36 4000.10 11.4 4.6 4.8 Moderately Acidified
Jul 21, 2009 11:00AM Jul 28, 2009 09:00AM 2.92 5113.10 5.37 4.6 4.9 Moderately Acidified
Jul 14, 2009 09:30AM Jul 21, 2009 11:00AM 0.57 960.10 23.4 4.5 4.8 Moderately Acidified
Jul 7, 2009 08:30AM Jul 14, 2009 09:30AM 1.68 2875.70 6.73 4.55 4.88 Moderately Acidified
Jun 30, 2009 01:30PM Jul 7, 2009 08:30AM 1.67 2957.50 10.1 4.55 4.85 Moderately Acidified
Jun 23, 2009 09:45AM Jun 30, 2009 01:30PM 2.05 3423.60 5.3 5.3 4.88 Normal
Jun 16, 2009 10:35AM Jun 23, 2009 09:45AM 2.27 3929.50 2.82 5.0 4.8 Normal
Jun 2, 2009 08:00AM Jun 9, 2009 06:15AM 0.00 0.00 Insuffient sample available for field measurements.
May 26, 2009 10:30AM Jun 2, 2009 08:00AM 1.64 1.42 Insuffient sample available for field measurements.
May 18, 2009 11:00AM May 26, 2009 10:30AM 0.16 287.50 16.1 4.9 5.05 Mildly Acidified
May 12, 2009 03:30PM May 18, 2009 11:00AM 0.41 672.00 13.0 4.58 4.8 Moderately Acidified
May 5, 2009 07:30AM May 12, 2009 03:30PM 1.73 2922.40 7.32 4.85 4.8 Mildly Acidified
Apr 28, 2009 02:00PM May 5, 2009 07:30AM 0.13 225.20 17.6 4.45 4.85 Moderately Acidified
Apr 21, 2009 02:30PM Apr 28, 2009 02:00PM 1.39 2445.50 10.8 4.8 4.9 Mildly Acidified

Term Definitions

Term: Definition
Sample Start Date Start date of the sample collection period.
Sample Stop Date Stop date of the sample collection period.
Total Precipitation - Rain Gauge (inches) Total amount of precipitation measured during the sample collection period in inches.
Total Precipitation - Sample Weight (grams) Weight of the precipitation collected during the sample collection period.
Field Conductance Reading (us/cm) Conductance is a measure of the ability of water to conduct an electrical current.  It provides an indication of the amount of dissolved material in the sample.  Units are microsiemens per centimeter.
Field pH Reading pH measures the scale of acidity of the water based on the hydrogen ion's activity.  The range goes from 0-14, with 7 being neutral.  pH of less than 7 indicates acidity, whereas a pH of greater than 7 indicates a base.  The natural background of rainwater in New England has a pH of approximately 5.0.
Field pH Check Sample Reading Quality Control Check Sample is used to verify the calibration of the pH Meter.  The check sample should read 4.90 +/- 0.20 pH units.
Precipitation Acidity Level General description of the acidity level based on the field pH reading.

General description of pH readings

pH Range Precipitation Acidity Category
7.00 - 9.99 Slightly alkaline
5.00 - 6.99 Normal
4.70 - 4.99 Mildly Acidified
4.40 - 4.69 Moderately Acidified
4.10 - 4.39 Strongly Acidified
1.00 - 4.09 Severely Acidified

 

Questions about this Service? Contact the Bureau at: (207) 287-2437 or Email: depair@maine.gov